How do I TRANSLATE relative to active/cursor?
Ideally what you are looking for is a translate using spherical coordinates, which is not currently supported; but it could certainly be added using a small script, see https://blenderartists.org/forum/showthread.php?168749-How-to-set-polar-coordinates&amp;p=1485444&amp;viewfull=1#post1485444

You could make a request, probably in the bug tracker, and see if anyone shows an interest, or if it is worth the effort, learn just enough about Python and Blender's add-on system to do it yourself.